I never heard about an ATM Skimmer before I checked a lot of information about it on Twitter. It is a scary idea since it can steal your ATM confidential information such as credit and debit card information. ATM Skimmer is basically a device which has been made to fix on the mouth of an ATM machine making it difficult to sense the difference between the actual ATM mouth front and the device which means when you insert a card; it would be going to the mouth of a theft machine stealing your information right away.
An interesting fact is that the ATM skipper has been around for some years now and it is being improved as the time progresses. The following ATM skimmer was found on a Citibank ATM in California.